I had a night with this last night. Trip report Here.
I didn't find the burn all that bad at first, but I found it got worse as the night went on. By the end of the night I had a line chopped up just sitting there staring at me for a while, but every time I got near it I'd almost gag as I imagined the feeling of it hitting the back of my throat. So I just put it away for the night. I took some etizolam and smoked some weed and didn't really have much trouble getting to sleep. I didn't experience any kind of crash, and honestly I could've gotten by without the etizolam.
My opinion on it was pretty positive, but reading this thread has given me some pause. It felt pretty safe to me, but now I'm thinking I should treat it with a little more respect.